//The code for the receiver Arduino board follows:

const int IRin = 7; // IR receiver module connect

const int spk = 8;

int pulseTone;

int pulsePeriod;

unsigned long currentTime;

unsigned long oldTime;

void setup() {

pinMode (IRin, INPUT_PULLUP);

pinMode (spk, OUTPUT);

}

void loop() {

pulseTone = digitalRead (IRin);

if (pulseTone == LOW) {

currentTime = millis();

pulsePeriod = currentTime - oldTime; //ppicks up the second burst

oldTime = currentTime;

if (pulsePeriod > 6 && pulsePeriod < 14) {

tone (spk, 500);

delay (5000);

noTone (spk); //speaker shuts off

pulsePeriod = 0; //reset

}

if (pulsePeriod > 16 && pulsePeriod < 24) {

tone (spk, 1000);

delay (5000);

noTone (spk); //speaker shuts off

pulsePeriod = 0;

}

if (pulsePeriod > 26 && pulsePeriod < 34) {

tone (spk, 5000);

delay (5000);

noTone (spk); //speaker shuts off

pulsePeriod = 0;

}

}//end of IRin reception

}